Beryllium sulfide

Beryllium sulfide

Identifiers
CAS Number	13598-22-6
ChemSpider	44415277
EC Number	237-064-6
Jmol 3D model	Interactive image
PubChem	83605
InChI InChI=1S/Be.S Key: FQDSYGKTHDFFCM-UHFFFAOYSA-N
SMILES [Be]=S
Properties
Chemical formula	BeS
Molar mass	41.077 g/mol
Appearance	white crystalline
Density	2.36 g/cm3
Melting point	1,800 °C (3,270 °F; 2,070 K) decomposes
Band gap	7.4 eV
Refractive index (nD)	1.741
Structure
Crystal structure	cubic
Thermochemistry
Specific heat capacity (C)	34 J/mol K
Std molar entropy (So298)	34 J/mol K
Std enthalpy of formation (ΔfHo298)	-235 kJ/mol
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Beryllium sulfide is an ionic compound from the sulfide group with the formula BeS.

Preparation

Beryllium sulfide powders can be prepared by the reaction of sulfur and beryllium in a hydrogen atmosphere by heating the mixture for 10-20 minutes at temperatures from 1000-1300 °C.

Alternatively, it can be prepared by the reaction of beryllium chloride and hydrogen sulfide at 1150 °C, though this reaction will leave chlorine impurities.